One I really enjoyed was by Rochelle Lockridge, the penultimate more dull than watching paint drip of her faucet

I think I suggested making it a GIF< and sure enough @Rockylou pulls out her GIFachrome camera
https://twitter.com/Rockylou22/status/408092073363910656
And then @JaapSoft jumps in with a matching sink stopper waiting
https://twitter.com/JaapSoft/status/408112589323763712
And thus, I could not avoid wanting to mashup them up. The video was done n iMovie, with both source videos downloaded from the YouTube as MP4s. I simply put them it at first 8 seconds each; I then selected both clips, pasted, and shorted each clip to 4 seconds, then 2, then 1.
I then used the advanced editing feature to put them in Side by Side mode, and repeated i reverse order the original sequence.
It needed some sound, so from Freesound I got: